Update Docs- sort()

[sakshichahal53]

Do the checklist before submitting the PR:

• [x ] Have you read the guidelines mentioned in CONTRIBUTING.md?
• [x ] Have you squashed your commits?

Q: What version of Node.js you've used in the project? (e.g. Node v10.11.0) A: v8.15.0

Q: Mention the Issue Number! (e.g. Fixed #8) A:

• Give additional information regarding the PR below: Updating docs for sort() function.

[codecov-io]

Codecov Report

Merging #154 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #154   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          78     77    -1     
  Lines        1282   1301   +19     
=====================================
+ Hits         1282   1301   +19

Impacted Files	Coverage Δ
src/index.js	100% <0%> (ø)	:arrow_up:
src/degree/index.js
src/radian/index.js
src/convert/index.js	100% <0%> (ø)

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[sakshichahal53]

okay, got it!